The best place to feel a weight reduction on a bike is in the rotating mass of the wheels, and these RideNow TPU inner tubes do exactly that. This one is the 20 inch (406mm) size and weighs 28 grams.
It uses a Presta valve (French valve) with a 45mm stem to suit most race rims, and maximum inflation is set by the pressure rating on your tyre. Inflate it slightly before fitting, no more than 5 psi (0.35 bar), and run clean rim tape lined up with the valve hole so the valve sits perpendicular to the rim.
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